28660477 has 2 divisors, whose sum is σ = 28660478. Its totient is φ = 28660476.

The previous prime is 28660451. The next prime is 28660483. The reversal of 28660477 is 77406682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20169081 + 8491396 = 4491^2 + 2914^2 .

It is a cyclic number.

It is not a de Polignac number, because 28660477 - 2⁷ = 28660349 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28660447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14330238 + 14330239.

It is an arithmetic number, because the mean of its divisors is an integer number (14330239).

Almost surely, 2^28660477 is an apocalyptic number.

It is an amenable number.

28660477 is a deficient number, since it is larger than the sum of its proper divisors (1).

28660477 is an equidigital number, since it uses as much as digits as its factorization.

28660477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 28660477 is about 5353.5480758092. The cubic root of 28660477 is about 306.0279816923.

The spelling of 28660477 in words is "twenty-eight million, six hundred sixty thousand, four hundred seventy-seven".